lol. I'm glad I'm able to feed F/T, being constricted can't be any fun.
Next time you have to visit the doctor, while he's/she's out (they always are), grab that blood pressure air inflatable thingy and put it around your neck and start pumpin!
A male probably won't hit 25 ft.. but 20 foot by no means unheard of for a male. 15 foot, over 100lbs? Yeah that's pretty damn likely.
It's pretty darn rare. Biggest one I am aware of is a Tiger maybe 18'. There i something up with the Tiger gene. They get larger than normal retics. There are more 20' retics that are Tigers than there are 20 normal retics.